about

/əˈbaʊt/ prep. / adv.
标准词条 CET-4
一句话记住

关于；涉及；大约；左右

释义与例句

prep. 关于；涉及
used to introduce the subject of something or to refer to a particular person or thing
  1. She wrote a book about her childhood in the countryside.
    她写了一本关于她在农村童年的书。
  2. I was just thinking about our holiday last summer.
    我刚才在想我们去年夏天的假期。
展开其余 1 条例句
  1. The documentary is about the impact of climate change.
    这部纪录片讲的是气候变化的影响。
adv. 大约；左右
used to state that a number, amount, or time is not exact
  1. There were about fifty people at the meeting.
    大约有五十人出席了会议。
  2. The journey takes about three hours by train.
    坐火车旅行大约需要三个小时。
展开其余 1 条例句
  1. I'll be ready in about ten minutes.
    我大约十分钟后就准备好。

词源与构词

记忆钩子 about 作介词常表示“关于”；作副词常表示“大约”，be about to do 表示“即将做某事”。

词族与关联词

同义词
  • approximately 大约；大概
    about 口语化，使用广泛；approximately 更正式，常用于数字、数量等较精确的估算。
    The cost is approximately two hundred pounds. 费用大约是二百英镑。
反义词
  • exactly 确切地；精确地
    about 表示不精确、大约；exactly 表示精确无误，两者在程度意义上相对。
    The package arrived exactly on time. 包裹准时到达。
易混词（形近或义近，注意区别）
  • around 大约；围绕
    about 作副词可表示“大约”；around 同样可表示“大约”，但更常用于非正式场合，还可表方向“围绕”。
    We should arrive at around six o'clock. 我们大约六点到达。
常见搭配
  • about to do something 即将做某事
    I was about to leave when the phone rang. 我正要离开，电话响了。
  • how about ……怎么样
    How about going for a walk after dinner? 晚饭后去散散步怎么样？